In a large bowl measure and add the butter, melt it in the microwave in 15 second intervals.
Add in the rest of the wet ingredients and mix well.
Add the flour into the same bowl followed by the rest of the dry ingredients and stir until well combined. (stir about 30 times- avoid over mixing, some tiny clumps are OK)
Line a muffin pan with muffin liners and scoop the batter into about 8 muffins.
Make the Streusel, in a small bowl melt the butter then add the rest of the ingredients to the melted butter and mix well.
Top each muffin with the crumble topping and place in the oven for 30 minutes.
LET COOL 15 MINUTES before trying to remove them.
Makes 8-10 muffins
Store in a sealed container for 2-3 days or in the fridge 4-5 days.
Notes
*measure the butter first while it is still solid, then melt it in the microwave.** to measure the flour use a spoon and scoop it into the measuring cup, level it off with the back of a butter knife, avoid packing or scooping the flour directly because it will provide too much flour.If you feel like you would like to mix the dry ingredients in a separate bowl before adding it to the wet ingredients go for it! I’m not a fan of the extra dishes when it’s not necessary.